3 * $Id: mpstuff.c,v 1.1 2004/04/02 18:04:01 mdw Exp $
5 * MP manipulation stuff
7 * (c) 2001 Straylight/Edgeware
10 /*----- Licensing notice --------------------------------------------------*
12 * This file is part of the Perl interface to Catacomb.
14 * Catacomb/Perl is free software; you can redistribute it and/or modify
15 * it under the terms of the GNU General Public License as published by
16 * the Free Software Foundation; either version 2 of the License, or
17 * (at your option) any later version.
19 * Catacomb/Perl is distributed in the hope that it will be useful,
20 * but WITHOUT ANY WARRANTY; without even the implied warranty of
21 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
22 * GNU General Public License for more details.
24 * You should have received a copy of the GNU General Public License
25 * along with Catacomb/Perl; if not, write to the Free Software Foundation,
26 * Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
29 /*----- Revision history --------------------------------------------------*
32 * Revision 1.1 2004/04/02 18:04:01 mdw
37 /*----- Header files ------------------------------------------------------*/
39 #include "catacomb-perl.h"
41 /*----- Main code ---------------------------------------------------------*/
43 /* --- Convert Perl integers to multiprecision --- */
45 mp *mp_fromiv(mp *d, IV iv)
47 MP_FROMINT(d, IV, iv);
54 MP_TOINT(x, IV, IV_MAX, i);
58 /* --- Parse Perl strings into integers --- */
60 typedef struct mptext_svctx {
65 static int svget(void *p)
68 if (c->i >= SvCUR(c->sv))
70 return ((unsigned char)SvPVX(c->sv)[c->i++]);
73 static void svunget(int ch, void *p)
76 if (ch == EOF || c->i == 0)
81 static int svput(const char *s, size_t sz, void *p)
84 sv_catpvn(c->sv, (char *)s, sz);
88 static const mptext_ops mptext_svops = { svget, svunget, svput };
90 mp *mp_readsv(mp *m, SV *sv, STRLEN *off, int radix)
99 m = mp_read(m, radix, &mptext_svops, &c);
105 int mp_writesv(mp *m, SV *sv, int radix)
112 rc = mp_write(m, radix, &mptext_svops, &c);
116 /* --- Conversion to and from SVs --- */
118 mp *mp_fromsv(SV *sv, const char *what, int radix, int keep, ...)
122 if (sv_derived_from(sv, "Catacomb::MP"))
123 m = (mp *)SvIV((SV *)SvRV(sv));
128 sv_vsetpvfn(t, what, strlen(what), &ap, 0, 0, 0);
129 croak("%s is not of type Catacomb::MP", SvPVX(t));
134 m = mp_fromiv(MP_NEW, SvIV(sv));
136 m = mp_readsv(MP_NEW, sv, 0, radix);
138 RET_MP(m); /* Kill temporary later */
143 /*----- That's all, folks -------------------------------------------------*/